25081720005 has 8 divisors (see below), whose sum is σ = 40130752032. Its totient is φ = 13376917328.

The previous prime is 25081720003. The next prime is 25081720057. The reversal of 25081720005 is 50002718052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25081720005 - 2¹ = 25081720003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25081720003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836057319 + ... + 836057348.

It is an arithmetic number, because the mean of its divisors is an integer number (5016344004).

Almost surely, 2^25081720005 is an apocalyptic number.

It is an amenable number.

25081720005 is a deficient number, since it is larger than the sum of its proper divisors (15049032027).

25081720005 is a wasteful number, since it uses less digits than its factorization.

25081720005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672114675.

The product of its (nonzero) digits is 5600, while the sum is 30.

The spelling of 25081720005 in words is "twenty-five billion, eighty-one million, seven hundred twenty thousand, five".